“…The expectations-forming mechanisms utilized in empirical studies have been varied and inventive. They have included an error-learning mechanism (Meiselman, 1962); distributed lags on past rates (Modigliani and Sutch, 1966) or on inflation (Modigliani and Shiller, 1973;; use of ex post data under an assumption that market efficiency and rationality require that ex post realizations do not differ systematically from ex ante views (Roll, 1970;Fama, 1984a and b); and survey data assumed to reflect the actual expectations of market participants (Kane and Malkiel, 1967;Malkiel and Kane, 1968;Kane, 1983). While affirming the general importance of expectations in influencing the shape of the yield curve, empirical studies have generally rejected the pure form of the expectations hypothesis.…”